Fix ignore comment handling for multiple traits in a single file

src/Analyser/FileAnalyser.php

@@ -114,7 +114,9 @@ public function analyseFile(
 					}
 					if ($node instanceof InTraitNode) {
 						$traitNode = $node->getOriginalNode();
-						$linesToIgnore[$scope->getFileDescription()] = $this->getLinesToIgnoreFromTokens([$traitNode]);
+						$fileDescription = $scope->getFileDescription();
+						$linesToIgnore[$fileDescription] ??= [];
+						$linesToIgnore[$fileDescription] += $this->getLinesToIgnoreFromTokens([$traitNode]);
 					}
 
 					if ($scope->isInTrait()) {

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -1619,6 +1619,12 @@ public function testBug13980(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testBug13945(): void
+	{
+		$errors = $this->runAnalyse(__DIR__ . '/data/bug-13945.php');
+		$this->assertNoErrors($errors);
+	}
+
 	/**
 	 * @param string[]|null $allAnalysedFiles
 	 * @return list<Error>

tests/PHPStan/Analyser/data/bug-13945.php

@@ -0,0 +1,18 @@
+<?php declare(strict_types = 1);
+
+namespace Bug13945;
+
+trait Foo {
+	public function baz(): void {
+		$this->myProperty = "a"; // @phpstan-ignore property.notFound
+	}
+}
+
+trait Baz {
+}
+
+class HelloWorld
+{
+	use Foo;
+	use Baz;
+}